Machine for notching and trimming electrotypes



(No-Model.) I Z'Sheets-Sheet 1.

0. M. LETZ.

MACHINE FOR NOTGHING AND TRIMMING ELEG'TROTYPES.

- Patented Nov; 14, 1882.

N PETERS PhMo-kRMgmphw. Washington. D. c.

UNITED STATES PATENT @EETQE.

CHARLES M. LE'IZ, OF CHICAGO, ILLINOIS, ASSIGNOR CF ONE-HALF TO A. ZEESE& (30., OF SAME PLACE.

MACHINE FOR NOTCHING AND TRIMMING ELECTROTYPES.

SPECIFICATION forming part of Letters Patent No. 267,353, dated November14, 1882,

Application filed June 13, 1882. (N model.)

To all whom it may concern Be it known that 1, CHARLES M. LETZ, ofChicago, in the county of Cook and State of Illinois, have inventedcertain new and useful Improvements in Machines for Notching andTrimming Electrotypes; and I do hereby declare that the following isafull, clear, and exact description thereof, reference being had to theaccompanying drawings, and to the letters of reference marked thereon,whichform a part of this specification.

This invention relates to machines for trimming, squaring, notching, andshaping the edges of electrotype-blocks; and it has for its object toproduce a machine in which such work can be performed with facility andaccuracy.

Therefore my invention consists of the novel devices and combinations ofdevices hereinafter described and specifically claimed.

In the accompanying drawings, Figurel represents a front elevation ofthe machine having my improvements; Fig. 2, a plan view of the same Fig.3, a vertical cross section on line y y in Fig. 1; Figs. 4. and 5, anelevation and plan view of the cuttergage detached; Fig. 6, a sectionalview on line a; m in Fig. 3; Fig. 7, side and edge views of thecutter-tools by me employed in this machine, and Fig.8 a detached planview of the adjustable gage-bar and angle-bar on top of the table andthe clamp for securing a brass rule to be mitered.

Corresponding letters in the several figures of the drawings designatelike parts.

A denotes'the frame of the machine, which is preferably made a solidcasting of four legs, that are connected by longitudinal and cross barsand plates in a manner-to combinelightness with strength, and upon thetop of this frame I rigidly secure an iron plate, B, which forms thebase plate for the spindle-head C. This spindle head C is shapedsomewhat like a lathe head, having journal boxes or a, in which thespindle cis pivoted, each journal-box being provided with an oil-cup, b,for supplyin g the lubricant to the spindle in uniform quantities. Aflanged pulley, D, is mounted upon the spindle 0 between thejournalboxes at a, and a cutter-head, E, is secured upon the overhangingend of such spindle c.

The cutter-head C consists of a sh allow disk, that is notched out fromtwo opposite sides, so as to have two segmental wings. A rectangularslot is cut in each wing, that is diagonal to the radial line, and ineach such slot is inserted a cutter-tool, d or e, which is adj ustablysecured therein by a set-screw, f.

The front side of frame A is formed with a vertical plate, 9, having toits edges dovetailed guides 71, one of which is cast solid with theframe and the other one is adjustably secured thereto by screw-bolts,and between such guides h is fitted the vertically-sliding support F fortable G.

To the bottom end of support F is pivotally connected the end of leverH, which at about its middleis suspended to an extension, i, of frametop plate B by a link, K, and that carries on its opposite end abalance-weight, I. A pedal-bar, L, is pivoted in a standard, K, that issecured upon the'floor, and its end is pivotally coupled to the forwardportion of lever H by a connecting-bar, L, in a manner that table G willbe raised by depressing the pedal L. The table Gis planed to beperfectly horizontal, and has a notch, l, ofjust sufficient width andlength to clear the cutters d or e of the rotating head E, so as toprovideas much supporting-surface for the electrotype-block as possible,and to prevent the wood backing from breaking out While being notched ortrimmed. also has a dovetailed groove, in, that is planed transverselytherein, or parallel with the face of cutter-head E and notch l. A bar,02, is fitted in groove m, having a set-screw, 0, by which to secure itat any desired position. A bar, M, that is L-shaped in cross-section, isrigidly secured to barn, so as to rest upon table G longitudinally andto be rectangular to the face of the cutter-headE. This bar M hasguide-heads j to its ends, that are'fitted to slide in the end edges oftable G and to insure a parallel movement of such bar M.

Upon the L-shaped bar M is fitted an anglebar, N, that also rests uponthe table G, is rectangular with bar M, and slides thereonlongitudinally. A block, 0, also fitted upon bar M so as to slidethereon, is made rigid with such bar at any desired position by aset-screw, p. In a projeetin g lug of this block 0 is journaled Thetable G an adjusting-screw, q, having a hand-wheel upon its end, and thescrew-threaded end of this screw q enters the screw-threaded lug of angle-bar N, so as to move the same longitudinally any desired shortdistance.

A block, 12, that carries a thumb-screw, r, is fitted in groove on, andis secured at any desired point by a set-screw, 8. By means of the screw1, the bar n, and therewith the bar M, can be adjusted laterally in amanner that an electrotype-block is held to the exact position relativeto the cutters d or 0, so as to rest upon the table G and with one edgeagainst the bar M, while its other edge is in contact with the angle-barN, which can be adjusted longitudinally.

For adjusting the longitudinal bar M and the angle-bar N to bring anyelectrotype in proper position to the cutter d, a reversible gage-plate,P, that is of the exact width and shape of the cutters, and which has asleeve, is adjustably secured by a set-screw upon an arm, t, which isrigidly mounted upon the end of a cylindrical rod, Q, having aknob-handle, a. This rod Q is pivoted in sleeve-bearings 'v c, that aresecured against the spindle-head G, and a coiled spring, W, isinterposed between arm 15 and bearing 0 upon rod Q, which will push suchrod Q and gage 1? toward the cutter-head. A short feather, 'w, is fixedto rod Q, that will engage with either one of two diametrically-oppositenotches in bearing a, so as to permit a semi-revolution of thegage-plate 1?, and to lock such gage-plate at either one of its twoextreme positions. For the rearward position the notch is shallow, butwith turning the gage forward by first disengaging the feather w fromthe rear notch such gage-plate is swung forward without touching thecutter-head and cutters until reaching the front notch in bearing 2;,that is cut a sufficient depth for the spring to push the gage-plate Punder andjust in line vertically with the cutters d or 0, so as toindicate on the electrotype that is placed below such gageplate theexact outline of the cut that is made. By its peculiar attachment thisgageplate P can be swung forward or backward while the cutter-head isrotated without coming in contact therewith.

The cutter-head E is incased at its sides, rear, and top, by a box R,the overhanging front end of which is connected by a hinge, so that itcan be opened. This box will catch the chips, which will dump into achamber, S, that is formed inside of frame A, whence these chips may beremoved from time to time, or spouted into a suitable receptacle thatmay be arranged under the machine.

The operation of the machine is as following, to wit: Anelectrotype-block, Z, that is to be'notched or trimmed is placed uponthe table G, with two of its edges against the bars M and N, which areadjusted by swinging gage I to hold such electrotype at the properposition relative to the cutters. The cutter-head being imparted a fastrotating movement, the table G is raised by depressing the pedal L untilsuch electrotype has been passed vertically by the cutters. In Fig. 8 adevice is shown for cutting and mitering brass rules in this machine.For this purpose a clamp, T, is fitted over bar M, the rear flange ofwhich (that is to hold and grasp the ruler) is slotted out, and aset-screw, y, is tapped through the front flange for drawing such ruleragainst the rear face of bar M. The cutter-tools, having a pointed ordiamond edge, are secured into the cutter-head E, and the angle-bar N isemployed as a gage for regulating the exact lengths the bars 2 are to becut. The table G being raised slowly by the pedal, a triangular groovewill be cut, that will sever the rulefs at the proper line and willmiter their ends at the same time.

As will be seen, the entire machine is simple in its construction, isarranged for fine and ready adjustment, and will perform very exact workwith expediency.

Vv'hat I claim is- 1. In machines for notching and trimming the edges ofelectrotypes, the rotating cutterhead E, provided with slots for holdingoutters d or e byset-screws f,in combination with the vertically-slidingtable G,having slot 1, all substantially as and for the purpose setforth.

2. In machines for notching and trimming the edges of electrotypes, therotating cutterhead E, in combination with the "erticallyguided table G,suspended to the top plate, B, of frame A by rod K and lever H, havingcounter-weight I, and being elevated by a treadle, L, and rod L, allsubstantially as and for the purpose set forth.

3. In machines for notching and trimming the edges of electrotypes, therotating cutterhead E, in combination with the verticallysliding tableG, provided with slot land groove m for guiding and holding thelongitudinal gage-bar M, having cross-bar a and set-screw 0, allsubstantially as and for the purpose described and shown.

4. In machines for notching and trimming the edges of electrotypes, therotating cutterhead E, in combination with the vertically sliding tableG, provided with slot Z and dovetailed groove m for guiding and holdingthe longitudinal gage-bar M, that has cross-bar n and set-screw 0, andforms the guide for an angle gage-bar, N, all substantially as and forthe purpose set forth.

5. The vertically-sliding table G, provided with dovetailed groove m forbar 1;, that has adjusting-screw 1' and set-screw s, and for bar n,secured to longitudinal bar M, and having set-screw 0, all substantiallyas and for the purpose set forth.

6. The combination,with the table G and laterally-adjustable gage-bar M,of the angle-bar N and block 0, both sliding upon bar M, such block 0being provided with a set'screw, p, and both bar N and block 0 beingconnected IIS substantially in the manner and for the purpose set forth.

In testimony that I claim the foregoing as my invention I aflix mysignature in presence of two witnesses. 15

CHARLES M. LETZ.

Witnesses:

H. HUEHL, v R. G. ScHMIn.

